dimond



(No Model.)

W. F. DIAL 8: G. H. DIMOND. 'TAKE-UP FOR SEWING MACHINES.

No. 599 ,894.- Patented Mar. 1 1898.

dle-bar-actuating shaft, it acting on the nee that the said take-up,

5o imparting UNITED STATES PATENT OFFICE.

WILBUE E. DIAL AND eEoEeE H. nnuonn, 0E BRIDGEPORT, CONNECTICUT,ASSIGNORS TO THE WHEELER & WILSON MANUFACTURING COMPANY, OF SAME PLACE.4

TAKE-UP FOR SEWINGQMACHINES.

SPECIFICATION forming part of Iletters IPatent No. 599,894, dated March1, 1898.

Application filed February 2,1897. Serial Ito-b21378. (No model.) i

its motion being accelerated at one portion of its cycle and decreasedat another portion of its ycle. The means or devices which in thispresent embodiment of our invention we have chosen by which to producethis extra I or variable motion is a stud extended from the crank-pinfor actuating said-link, said To all whom it may concern/.-

Be it known that we, WILBUR F. DIAL and GEORGE H. DIMOND, of Bridgeport,county of Fairfield, and State of Connecticut, have invented anImprovement in Take-Ups for Sewing-Machines, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the the needle-bar and between it and thecrankpin, so that its upper end vibrates laterally across the face ofthe said crank, insures a compact arrangement of the parts and puts thetake-up in a positionwhere it cannot be injured, bent, or disturbed byaccident.

Figure 1 in front elevation shows a sufficient portion of asewing-machine with our improvements added to enable our invention to beunderstood, the take-up being in position to just commence the taking upof the loop of needle-thread. Fig. 2 shows the takeup and needle-bar intheir position when the take-up has fully taken up the said loop, thedotted lines showing the said take-up in the position it occupies whenthe point of the usual loop-taker is about to enter the loop of threadcarried by the needle. Fig. 3 shows the disk and crank-pin, with thestud b in section, and its block; Fig. 4, a partial detail showing thethread-guides with the end of the take-up between them, and Fig. 5 a topview of one of the thread-guides.

The bed-plate A, the overhanging arm or head A, the disk B at the frontend of the needle-bar-actuatin g shaft B, the needle-bar G in suitablebearings, its attached needle 0, I and the link 0 for actuating saidneedle-bar, its lower end surrounding a stud on a collar 0 fixed to theneedle-bar, are and may be all as usual in the well-k nown WheelerWilson machine.

The disk B has a usual, enters an eye in the upper en link C but hereinthe crank-pin has been provided (see Fig. 3) with a stud b, whichprojects forwardly therefrom at one side of or eccentric to the centerof said crank-pin.

Our improved take-up d is herein shown-as an arm or lever having at itsupper end an attached to the needle-bar-actuating shaft. This form oftake-up is well adapted for all general work; but for some special workwhen excessively high speed is required it has been thought that the camin its action tends to limit somewhat the speed, and hence we havedevised a novel take-up mechanism in which the said cam-hub is dispensedwith and the power required to actuate the take-up is reduced to theminimum. I

In accordance with our invention we have utilized the usual linkconnecting the needlebar and the crank-pin for operating the needle-baras the actuator for the take-up, and we have located this take-up behindthe plane in which the needle-bar works and have located the eye of thetake-up above the needle-thread'between two guides.

In our invention the take-up, whose eye is exposed above theneedle-bar-actuatin g shaft, is so made and operated that in itsoperation of taking up the loop of needle-thread dis-' charged from theloop-taker it not only rises and falls with the needle-bar-actuatinglink, but it is also moved in a vertical plane, so

together with its eye through which the thread is passed, movestransverse to and fully crosses the center of rotation of saidneedle-bar-actuating shaft, and in this way it becomes possible to givea great range of motion to said take-up, the motions being all easy andsubstantially without shock. In addition to this movement imparted tothe take-up due to its being actuated by the needle-bar link referred towe have also shown, as we prefer, the said takeup as having combinedwith it a device for to said take-up at portions of its cycle ofmovement additional extra motion,

crank-pin b, which, as d of the stud extending from said crank-pinat'one drawings representing like parts. side of or eccentric to itscenter, the said stud In many modern two-thread sewingmaworking in aslot in the take-up lever. chines the take-up is operated by a cam-hubLocating the take-up, as described, behind eye d for the needle-thread,and the stud Z) referred to passes through said lever, the latterhaving, as shown in this embodiment of our invention, a slot (Z in whichenters an 5 antifriction block or roll 2 (see Fig. 3) loose on saidstud. The end of the take-up lever opposite the said eye (Z is mountedto turn for a limited distance on or about a fulcrum 4, herein shown asa stud-screw entering said I0 link;

In operation the crank-pin Z), carried by the disk, causes said link toimpart to the needlebar its usual reciprocations, the stud 1), extendedfrom said crank-pin at one side of its center, acting in the slot (Zcausing the said take-up to have imparted to it, in addition to itsmovements in unison with the said link as it is carried about by thecrank, an extra or additional movement, which movement would not beimparted to said take-up if fixed rigidly on or with relation to saidlink, the said takeup having its movement retarded as it is acting todraw up the loop of needle-thread and having its movement acceleratedafter having taken up the loop and while it is acting position, Fig. 2,into the full-line position, Fig. 1, the eye on the take-up levertravels in the dotted line e, the needle-bar during movement of the saidtake-u p passes the needle-bar in moving from the position Figs. 1 to 2.

that it Will be obvious to those skilled in the art that various devicesmight be devised for effecting this acceleration and retardation of themovement of the take-up with the exercise of only the skill of themechanic. or is this invention limited to the particular tension deviceor thread-guides or to the use of any particular number ofthread-guides, as these things may be variouslymodified to suit theneeds of the particular machine to which the take-up is applied.

lVe have not herein illustrated the stitchused in the formation of thenext loop. The needle-thread f, taken from a suitable spool or cop, (notshown,) is led about a thread- 0 check f thence about a tension devicecomposed, as herein shown, of two disks 9 9, one I of which is actedupon by a suitable spring 9 the force of which is regulated by a suitmaybe substantiallysuch as shown in United States Patent N o. 57 8,136,dated March 2, 1897, granted to us, the loop-taker being rotated in ahorizontal plane.

Having fully described our invention, what we claim, and desire tosecure by Letters Iatent, is-

1. A needlebar, a needle bar-actuating shaft having a crank-pin andalink to connect it with the needle-bar, combined with a take- 5 fromthe tension device is led between the two plates h h of a thread-guideand partially about a roller 011 a stud 7L3, and, emerging from betweensaid plates, it crosses a spring h, which acts as a slack-threadcontroller to con- 40 trol the slack in the thread due to any variamentsof said link by or from said crank-pin, said take-up being located andmovable in a vertical plane substantially at right angles to and acrossthe axial center of said shaft behind said needle-bar, substantially asdescribed.

2. A needle-bar, a needle-bar-actuating no second thread-guide m and toand through shaft having a crank-pin, and a link between 5 the eye ofthe needle in usual manner.

In operation, assuming that the disk travels in the direction of thearrow, Fig. 1, and with the take-up eye in the position shown in Fig. 1,it having through it the needle-thread 5o stretched between thethread-guides h h and m, said take-up, the needle-bar, and needle thenrising starts to the left (see Fig. 1) with its retarded movement andcompletes its retarded movement as it reaches the position 55 shown byfull lines, Fig. 2, the loop of needlethread at such time having beenfully taken up and the needle-bar having completed its link in itsmovements by said crank-pin, said take-up at such time crossing thevertical plane in which the needle-bar works, substan- 12o tially asdescribed.

crank-pin, combined with a take-up lever car- I25 ried by and movablewith said link as the same is actuated by said crank-pin, and with meansto impart to said take-up lever, in addition to its regular movementwith said link, a variable movement of acceleration and retardation,substantially as described.

In a sewing-machine, a ncedle-bar-actuating shaft provided with acrank-pin having an eceentrically-placed stud extended from 60 movingfrom the position shown in full lines,

same figure, the take-up travels at its fastest or accelerated speed,and during such time the needle continues to descend and the loop- 65taker enters the loop, and the needle is just about ready to or has juststarted to rise, and as the take-up moves from the dotted-line one endthereof, a needle-bar, and a link connecting said bar and crank-pin,combined with a take-up lever pivoted at or near one end on said linkand engaged between its ends by said eccentric stud, it serving to swingsaid lever on its fulcrum, substantially as described.

5. A needle-bar, a needle-baractuating shaft provided with a crank-pinand a link to connect it with the needle-bar, combined with a take-uppivotally mounted on said link and having its eyed end extended abovesaidcrank-pin, said take-up partaking of all of the movements of thesaid link, and means between said crank-pin and said take-up lever toimpart to the take-up lever during its movements with the said link avariable movement of acceleration and retardation, substantially asdescribed.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

WILBUR F. DIAL. GEORGE H. DIMQND.

Witnesses ISAAC HOLDEN, GEO. OoRNWELL.

